by Hayley Phelan

Whether walking the red carpet, or getting snapped by the paparazzi, Alexa Chung, Erin Wasson and Mary-Kate and Ashley Olsen are four stars who know how to hit all the right sartorial notes. But how do the stylish stars fare when they're on the other side of the designing process? After showing their collections for Madewell, RVCA and The Row, respectively, the stars made the mandatory appearance on the runway - but this time, as designers! Which one do you think works their design star look best? Mary-Kate and Ashley Olsen opted for comfort in long skirts and cozy tops. The look is chicly grunge and very 'artist' appropriate. Alexa Chung went for her usual preppy-cool look that's both young and professional in a buttoned-up shirt and velvet shorts from her own collection for Madewell. Erin Wasson opted for an undone hippie look in flares, a waistcoat and to top it all off, a velvet top hat! But which star do you think works the designer look best? Cast your vote in the comments!